Wrench.



\ No. 665,03l. Patented an. l,- ll.

A. PAULSON. WRENCH'.

(Applifmag mea .rune 14, 900,1

iNo Model.)

,l .I 5,3% a

UNITED vSTATES PATENT OFFICE.

AUGUST PAULSON, OE SISSETON AGENCY, SOUTH DAKOTA, ASSIGNOR OF ONE-HALETo JOHN ROBINSON, or SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 665,031, dated January1, 1901.

Application filed .Tune 14, 1900. Serial 110520,836. (No model.)

To all whom zit may concern:

Beit known that I, AUGUST PAULSON, a citizen of the United States,residing at Sisseton Agency, in the county of Roberts and State of SouthDakota, have invented new and useful Improvements in Wrenches, of whichthe following is a specification.

My invention relates to monkey-wrenches, the object being to provideimproved means for locking the movable jaw of a wrench in its adjustedposition. I

The Construction of the improvement will be fully described hereinafterin connection with the accompanying drawings, which form a part of thisspecification, and its novel features will be defined in the appendedclaims.

In the drawings, Figure 1 is a side elevation of a wrench embodying theinvention. Fig. 2 is a central longitudinal section of the same, andFig. 3 is a transverse section on the line 3 3 of Fig. 1.

The reference-numeral 1 designates the shank of the wrench, formed alongits inner face with ratchet-teeth 2 and having the fixed jaw 3 securedto its upper end by aA screw 4. The shank is formed on opposite sideswith central longitudinal ribs 5 to guide the movement of the movablejaw 6, the latter being provided with internal grooves 7 to receive saidribs.

The movable jaw 6 is formed with a recess 8, within which is pivotallysecured a lever 9, provided with a toothed projection lO, adapted toengage the teeth of the shank 1, as clearly illustrated in Figs. 1 and2.

At the lower end of each of the ribs 5 is a curved stop or shoulder 1l,adapted to receive the contact of ears 12, depending from the Vmovablejaw 6 to limit the downward movelug 17, projecting from the lever andhaving its ends 18 turned upward to engage the stops 11, and thus lockthe lever 14 in clamping engagement with the lever 9, the stops beingslotted at the point 19 to accommodate the ends of the bail.

A coil-spring 20 is interposed between the shank and the lever 14, theends of the spring being held in sockets formed in the shank and lever.The function of this spring is to throw the clamping-lever 14 outwardaway from the shank after the bail is released.

The utility and operation of the device constructed as thus describedwill be readily understood. The movable jaw 6 is readily adj usted tothe desired position, after which the teeth of the lever 9 are, broughtinto engagement with the teeth of the shank, and the clamping-lever ispressed against the lever`9 and locked by the engagement of the ends 18of the bail with the stops 11.

I claim- 1. A wrench comprising a shank formed with teeth along oneedge; a fixed jaw; a movable jaw on the shank; a toothed lever pivotallysecured to said movable jaw; stops projecting from opposite sides of theshank to limit the downward movement of the movable jaw; aclamping-lever pivotally secured to the lower end of the shank; and adevice for locking the clam ping-lever in engagement with the toothedlever, consisting of a bail secured to said clamping-lever andhavingupturned ends adapted to engage saidstops.

2. A wrench comprising a shank formed with teeth along one edge; andwith longitudinal ribs terminating in curved stops; a jaw fixed to saidshank; a jaw movablepon said shank; and having depending ears; a leverpivotally secured to said movable jaw and having teeth adapted to engagethe teeth of the shank a clamping-lever pivotally secured to the lowerend of the shank; a locking-bail carried by said clam ping-lever andhaving its ends turned upward to engage said stops and a springinterposed between the shank and clamping-lever.

In testimony whereof I affix my signature in presence of two witnesses.

AUGUST PAULSON.

